CN203720285U - Online electric power quality monitoring device - Google Patents
Online electric power quality monitoring device Download PDFInfo
- Publication number
- CN203720285U CN203720285U CN201420038773.4U CN201420038773U CN203720285U CN 203720285 U CN203720285 U CN 203720285U CN 201420038773 U CN201420038773 U CN 201420038773U CN 203720285 U CN203720285 U CN 203720285U
- Authority
- CN
- China
- Prior art keywords
- signal processor
- digital signal
- analog
- monitoring device
- digital converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses an online electric power quality monitoring device, which comprises a single chip microcomputer, a digital signal processor and an analog to digital converter, wherein data interaction is carried out between the single chip microcomputer and the digital signal processor and between the digital signal processor and the analog to digital converter via a high-speed serial interface SPI; the digital signal processor is electrically connected with storage units SDRAM, Flash and EEPROM; the digital signal processor is communicated with a GPS clock synchronization module via a UART serial port; the analog to digital converter is respectively electrically connected with a voltage transformer conditioning circuit and a current transformer conditioning circuit; the voltage transformer conditioning circuit is electrically connected with the analog to digital converter and the digital signal processor respectively sequentially via a DC-blocking bandpass filter, a shaping circuit and a phase-locked loop circuit; and the single chip microcomputer is connected with a human-computer interaction module, a storage interface module and a communication module. According to the online electric power quality monitoring device, the structure is simple, the manufacturing cost is low, the detection precision is high, errors are small, and transient signals can be acquired and completely recorded.
Description
Technical field
The utility model relates to technical field of electricity, especially relates to a kind of electric energy quality on-line monitoring device.
Background technology
Along with the progressively enhancing of scientific and technical develop rapidly and economic strength, on the one hand, due to a large amount of uses of perturbation load (as non-linear, impact or out-of-balance load etc.), much electricity quality problems are caused, such as tri-phase unbalance factor, voltage swells rapid drawdown, voltage flicker and harmonic pollution etc.; On the other hand, due to being widely used of Power Electronic Technique and microelectric technique, make the requirement of the quality of power supply more and more higher.Therefore, need electric energy quality on-line monitoring device Real-Time Monitoring, record, the analysis electrical network quality of power supply.
The sampling rate of existing electric energy quality on-line monitoring device is 512 points/cycle, 1024 points/cycle, often can not collect transient signal or can not truly intactly record transient signal, and what quality of power supply event time label adopted is the clock of single-chip microcomputer, inevitably there is error in the time that causes recorded event to occur.
Utility model content
Technical problem to be solved in the utility model is, overcomes the above-mentioned defect that prior art exists, provide a kind of can be to the monitoring of electrical network quality of power supply real-time intelligent, show, record and the electric energy quality on-line monitoring device analyzed.
The utility model solves the technical scheme that its technical matters adopts, a kind of electric energy quality on-line monitoring device, comprise single-chip microcomputer, digital signal processor and analog to digital converter, between described single-chip microcomputer and digital signal processor, all carry out data interaction by serial line interface SPI at a high speed between digital signal processor and analog to digital converter; Described digital signal processor is electrically connected with storage unit SDRAM, Flash and EEPROM, and described digital signal processor communicates by UART serial ports and gps clock synchronization module; Described analog to digital converter is electrically connected with voltage transformer (VT) modulate circuit summation current transformer modulate circuit respectively; Described voltage transformer (VT) modulate circuit is successively by being electrically connected with analog to digital converter and digital signal processor respectively every straight bandpass filter, shaping circuit and phase-locked loop circuit, and described single-chip microcomputer is connected with human-computer interaction module, store interface module and communication module.
Further, described human-computer interaction module is TFT LCDs.
Further, described store interface module is USB OTG2.0 interface.
Further, described communication module is 10/100M self-adaptation Ethernet interface, two RS-485 mouth.
Further, the current transformer modulate circuit that described current transformer modulate circuit is 5A/5mA, its sampled signal is Ia, Ib, Ic; Convert sampled signal to little simulating signal in analog to digital converter range ability.
Further, the voltage transformer (VT) modulate circuit that described voltage transformer (VT) modulate circuit is 380V/1V, its sampled signal is Ua, Ub, Uc; Convert sampled signal to little simulating signal in analog to digital converter range ability.
Further, described phase-locked loop circuit by digital signal processor catch pin ECAP0, ECAP1, ECAP2 is electrically connected with digital signal processor.
Further, described single-chip microcomputer is the embedded chip of Cortex-M4 kernel, and concrete model is MK70FX512VMJ15.
Further, described analog to digital converter is the high-speed chip ADS8556 of 6 Channel Synchronous samplings, and when serial, high conversion rate reaches 450kSPS.
Further, the chip of described digital signal processor is 6000 series fixed point/floating-point signal processor TMS320C6747 of C674x kernel, and main clock frequency can reach 456MHz the soonest, and inner sampling DMA technology is carried out the unloading of data.
Compared with prior art, the utility model is simple in structure, low cost of manufacture; Analog to digital converter can be realized 6 Channel Synchronous samplings, and sampling rate is set to 409.6kHz, every cycle 8192 points of sampling; Accuracy of detection is high, adopts phase-locked loop circuit, can realize the real-time follow-up of three phase network frequency, measures accurately power network signal fundamental frequency, and three phase network frequency 8192 frequencys multiplication of following the tracks of are used for driving analog to digital converter synchronized sampling; Error is little, can gather and complete documentation transient signal.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model one embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
The present embodiment comprises single-chip microcomputer 9, digital signal processor 4 and analog to digital converter 3, between single-chip microcomputer 9 and digital signal processor 4, all carry out data interaction by serial line interface SPI at a high speed between digital signal processor 4 and analog to digital converter 3; Digital signal processor 4 is electrically connected with storage unit SDRAM10, Flash11, EEPROM12, and digital signal processor 4 communicates by UART serial ports and gps clock synchronization module 8; Analog to digital converter 3 is electrically connected with voltage transformer (VT) modulate circuit 2 summation current transformer modulate circuits 1 respectively; Voltage transformer (VT) modulate circuit 2 is successively by being electrically connected with analog to digital converter 3 and digital signal processor 4 respectively every straight bandpass filter 5, shaping circuit 6 and phase-locked loop circuit 7, and single-chip microcomputer 9 is connected with TFT LCDs 13, USB OTG2.0 interface 14,10/100M self-adaptation Ethernet interface 15, two RS-485 mouth 16.
The current transformer modulate circuit that current transformer modulate circuit 1 is 5A/5mA, its sampled signal is Ia, Ib, Ic; Convert sampled signal to little simulating signal in analog to digital converter range ability.
The voltage transformer (VT) modulate circuit that voltage transformer (VT) modulate circuit 2 is 380V/1V, its sampled signal is Ua, Ub, Uc; Convert sampled signal to little simulating signal in analog to digital converter range ability.
Phase-locked loop circuit 7 by digital signal processor 4 catch pin ECAP0, ECAP1, ECAP2 is electrically connected with digital signal processor 4.
Single-chip microcomputer 9 is the embedded chip of Cortex-M4 kernel, and concrete model is MK70FX512VMJ15.
The main clock frequency of MK70FX512VMJ15 is up to 150MHz, sheet interior static RAM (SRAM) data-carrier store, the Flash program storage of 512KB and the distinctive programmable FlexNVM of the Freescale of 512KB up to 128KB, up-to-date arm processor framework, antijamming capability is strong, can meet the demand of industry spot, between single-chip microcomputer 9 and digital signal processor 4, carry out data interaction by serial line interface SPI at a high speed and obtain power quality data, and transplanted the management function of embedded real-time operating system MQX for Cortex-M4 functional unit.
Analog to digital converter 3 is the ADS8556 of the high speed of 6 Channel Synchronous samplings, and sampling rate is set to 409.6kHz, every cycle sample 8192 points and the sampling of 6 Channel Synchronous.
The chip of digital signal processor 4 is 6000 series fixed point/floating-point signal processor TMS320C6747 of C674x kernel, and main clock frequency can reach 456MHz the soonest, and inner sampling DMA technology is carried out the unloading of data.
When work, 6 channel sample signal Ua, Ia, Ub, Ib, Uc, Ic are after voltage transformer (VT) modulate circuit 2 summation current transformer modulate circuits 1 are isolated, processed, sampled signal Ua, Ia, Ub, Ib, Uc, Ic are given respectively to 6 sampling channels of analog to digital converter 3, and obtain the sampled signal in analog to digital converter 3 range abilities, sampled signal and analog to digital converter 3 are isolated to protection analog to digital converter 3 chips simultaneously; Meanwhile, by three-phase voltage signal Ua, Ub, Uc through every straight bandpass filter 5 filtering DC component and high fdrequency components, then by shaping circuit 6 obtain and three-phase voltage first-harmonic with square wave frequently, then give phase-locked loop circuit 7; Phase-locked loop circuit 7 carries out accurately measuring and signal synchronized sampling to square wave, the chip of sampling is FS7145, FS7145 meeting genlocing electrical network power frequency component, the electrical network power frequency square-wave signal of FS7145 output sends digital signal processor 4 to by catching pin ECAP0, ECAP1, ECAP2, obtain three-phase voltage fundamental frequency, frequency multiplication is used for driving analog to digital converter 3 to start sampling simultaneously.
Gps clock synchronization module 8 communicates by serial ports and digital signal processor 4, while regularly the RTC of digital signal processor 4 inside being carried out to school, and the time that energy accurate recording electrical network quality of power supply event occurs.
Digital signal processor 4 is responsible for processing and the communication of digital signal, and outside extended memory SDRAM10, FLASH11, EEPROM12, be respectively used to load operating program, storage program, storage calibration data; Digital signal processor 4 carries out data interaction with analog to digital converter 3 by SPI, the SPI of digital signal processor 4 adopts DMA technology, obtain after analog to digital converter 3 sampled datas, digital signal processor 4 adopts Fourier pair sampled data to carry out spectrum analysis, obtain conventional power quality data and event analysis data, conventional power quality parameter comprises voltage, electric current, power, voltage deviation, frequency departure, harmonic wave, flickering, tri-phase unbalance factor, the total percent harmonic distortion of voltage, the total percent harmonic distortion of electric current; Event analysis comprises that voltage deviation transfinites, frequency departure transfinites, voltage fluctuation is transfinited, negative phase-sequence degree of unbalancedness transfinites, long-time flickering is transfinited, total percent harmonic distortion transfinites, relative harmonic content transfinites, odd harmonic voltage transfinites, even-order harmonic voltage transfinites.
Claims (10)
1. an electric energy quality on-line monitoring device, comprise single-chip microcomputer, digital signal processor and analog to digital converter, it is characterized in that, between described single-chip microcomputer and digital signal processor, all carry out data interaction by serial line interface SPI at a high speed between digital signal processor and analog to digital converter; Described digital signal processor is electrically connected with storage unit SDRAM, Flash and EEPROM, and described digital signal processor communicates by UART serial ports and gps clock synchronization module; Described analog to digital converter is electrically connected with voltage transformer (VT) modulate circuit summation current transformer modulate circuit respectively; Described voltage transformer (VT) modulate circuit is successively by being electrically connected with analog to digital converter and digital signal processor respectively every straight bandpass filter, shaping circuit and phase-locked loop circuit, and described single-chip microcomputer is connected with human-computer interaction module, store interface module and communication module.
2. electric energy quality on-line monitoring device according to claim 1, is characterized in that, described human-computer interaction module is TFT LCDs.
3. electric energy quality on-line monitoring device according to claim 1, is characterized in that, described store interface module is USB OTG2.0 interface.
4. electric energy quality on-line monitoring device according to claim 1, is characterized in that, described communication module is 10/100M self-adaptation Ethernet interface, two RS-485 mouth.
5. electric energy quality on-line monitoring device according to claim 1, is characterized in that, the current transformer modulate circuit that described current transformer modulate circuit is 5A/5mA, and sampled signal is Ia, Ib, Ic; Convert sampled signal to simulating signal in analog to digital converter range ability.
6. electric energy quality on-line monitoring device according to claim 1, is characterized in that, the voltage transformer (VT) modulate circuit that described voltage transformer (VT) modulate circuit is 380V/1V, and sampled signal is Ua, Ub, Uc; Convert sampled signal to simulating signal in analog to digital converter range ability.
7. electric energy quality on-line monitoring device according to claim 1, is characterized in that, described phase-locked loop circuit by digital signal processor catch pin ECAP0, ECAP1, ECAP2 is electrically connected with digital signal processor.
8. electric energy quality on-line monitoring device according to claim 1, is characterized in that, described single-chip microcomputer is the embedded chip of Cortex-M4 kernel, and concrete model is MK70FX512VMJ15.
9. electric energy quality on-line monitoring device according to claim 1, is characterized in that, described analog to digital converter is the high-speed chip ADS8556 of 6 Channel Synchronous samplings, and when serial, switching rate reaches 450kSPS.
10. electric energy quality on-line monitoring device according to claim 1, it is characterized in that, the chip of described digital signal processor is 6000 series fixed point/floating-point signal processor TMS320C6747 of C674x kernel, main clock frequency reaches 456MHz, and inner sampling DMA technology is carried out the unloading of data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420038773.4U CN203720285U (en) | 2014-01-22 | 2014-01-22 | Online electric power quality monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420038773.4U CN203720285U (en) | 2014-01-22 | 2014-01-22 | Online electric power quality monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203720285U true CN203720285U (en) | 2014-07-16 |
Family
ID=51159426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420038773.4U Expired - Fee Related CN203720285U (en) | 2014-01-22 | 2014-01-22 | Online electric power quality monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203720285U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785098A (en) * | 2016-03-02 | 2016-07-20 | 谢彬琪 | Portable electric energy quality monitor with complete touch screen |
| CN105785202A (en) * | 2016-04-29 | 2016-07-20 | 孙文兵 | Dynamic electric energy quality detection apparatus |
| CN106707075A (en) * | 2017-03-27 | 2017-05-24 | 青岛高科通信股份有限公司 | Online electric energy quality monitoring system based on ARM and FPGA |
| CN107202930A (en) * | 2017-07-11 | 2017-09-26 | 天津市万贸科技有限公司 | A kind of quality of power supply on-line monitoring method and device |
| CN108535576A (en) * | 2018-05-24 | 2018-09-14 | 国网辽宁省电力有限公司电力科学研究院 | Multichannel power quality analysis device based on 3G network |
| CN108535575A (en) * | 2018-05-24 | 2018-09-14 | 国网辽宁省电力有限公司电力科学研究院 | Power quality analysis device based on short-distance wireless communication technology |
| CN111665406A (en) * | 2020-06-10 | 2020-09-15 | 浙江华电器材检测研究所有限公司 | Charging station electric energy quality monitoring system |
| CN113311223A (en) * | 2021-06-03 | 2021-08-27 | 上海市计量测试技术研究院 | Voltage drop detector and detection method |
-
2014
- 2014-01-22 CN CN201420038773.4U patent/CN203720285U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785098A (en) * | 2016-03-02 | 2016-07-20 | 谢彬琪 | Portable electric energy quality monitor with complete touch screen |
| CN105785202A (en) * | 2016-04-29 | 2016-07-20 | 孙文兵 | Dynamic electric energy quality detection apparatus |
| CN106707075A (en) * | 2017-03-27 | 2017-05-24 | 青岛高科通信股份有限公司 | Online electric energy quality monitoring system based on ARM and FPGA |
| CN107202930A (en) * | 2017-07-11 | 2017-09-26 | 天津市万贸科技有限公司 | A kind of quality of power supply on-line monitoring method and device |
| CN108535576A (en) * | 2018-05-24 | 2018-09-14 | 国网辽宁省电力有限公司电力科学研究院 | Multichannel power quality analysis device based on 3G network |
| CN108535575A (en) * | 2018-05-24 | 2018-09-14 | 国网辽宁省电力有限公司电力科学研究院 | Power quality analysis device based on short-distance wireless communication technology |
| CN111665406A (en) * | 2020-06-10 | 2020-09-15 | 浙江华电器材检测研究所有限公司 | Charging station electric energy quality monitoring system |
| CN113311223A (en) * | 2021-06-03 | 2021-08-27 | 上海市计量测试技术研究院 | Voltage drop detector and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203720285U (en) | Online electric power quality monitoring device | |
| CN102508035B (en) | Fuel cell AC impedance on-line testing system and measuring and controlling method | |
| CN202305673U (en) | Alternating current (AC) impedance testing device suitable for fuel cells | |
| CN108646138A (en) | Network of ship electric energy quality monitoring system based on FPGA and method | |
| CN103529294A (en) | HHT (Hilbert-Huang Transform)-based harmonic detection system and method for grid-connected inverter of photovoltaic system | |
| CN102298099A (en) | Power distribution and consumption monitoring and measuring apparatus possessing time calibration function | |
| CN105137164A (en) | Voltage sag on-line monitoring device applied in power system | |
| CN103995198A (en) | Analog input merging unit metering performance detection device and detection method thereof | |
| CN202522693U (en) | Device for detecting measure accuracy degree of electric energy meter | |
| CN103439590A (en) | Electric energy monitoring DSP control system | |
| CN203178477U (en) | Automatic detection device for reliability of intelligent electric energy meter | |
| CN203204090U (en) | Substation zinc oxide arrester on-line monitoring device | |
| CN202453439U (en) | Comprehensive handheld power quality tester | |
| CN205809203U (en) | A kind of converter special test system | |
| CN202066925U (en) | Harmonic monitor of electric network | |
| CN202815193U (en) | Battery test device | |
| CN204575761U (en) | A kind of electric energy quality on-line monitoring device | |
| CN204405737U (en) | A kind of harmonic measurement device based on DSP | |
| CN103389423A (en) | Power quality analyzer | |
| CN203275517U (en) | Multifunctional three-phase harmonic wave electric energy meter | |
| CN202008508U (en) | Serial connection reactor tester | |
| CN204595175U (en) | For the hardware circuit of intelligent instrument battery power consumption sampling | |
| CN203949980U (en) | The charged detector of capacitance type potential transformer | |
| CN203204073U (en) | Digital phase-difference measuring instrument | |
| CN207366676U (en) | A kind of single-phase electric energy mass detecting instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20150122 |
|
| EXPY | Termination of patent right or utility model |